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Logstash MCQs and Answers with Explanation: Logstash is an open-source data processing tool that allows developers to collect, parse, and transform logs and other data from various sources. It is part of the Elastic Stack and is commonly used in combination with Elasticsearch and Kibana for log analysis and monitoring. Logstash provides a flexible platform for developers to manage their data and gain insights into their applications. Check out the below sections and get the Logstash MCQ Questions And Answers along with a detailed explanation for each question.
Logstash MCQs with Answers
To test your understanding of Logstash concepts and best practices, Logstash MCQs and Answers are a valuable resource. These Logstash Multiple Choice Questions/ Logstash Quiz provide a way to assess your knowledge and identify areas where you need to improve. Whether you are a beginner or an experienced developer, Logstash MCQs can help you improve your skills in using this powerful tool.
Logstash Multiple Choice Questions
| Name | Logstash |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 60 Logstash MCQ Questions with Answers | Logstash Quiz
1. What is Logstash used for in DevOps?
A) Monitoring log files
B) Alerting on system failures
C) Aggregating system metrics
D) All of the above
Answer: D) All of the above
Explanation: Logstash is used to monitor log files, alert on system failures, and aggregate system metrics to help DevOps teams maintain system availability and performance.
2. What type of data can be processed by Logstash?
A) Structured data only
B) Unstructured data only
C) Both structured and unstructured data
D) None of the above
Answer: C) Both structured and unstructured data
Explanation: Logstash can process both structured and unstructured data from a variety of sources, including log files, metrics, and events.
3. Which of the following is not a component of the ELK stack?
A) Elasticsearch
B) Logstash
C) Kibana
D) Prometheus
Answer: D) Prometheus
Explanation: Prometheus is not a component of the ELK stack. The ELK stack includes Elasticsearch, Logstash, and Kibana.
4. What is the purpose of a Logstash pipeline?
A) To process data
B) To store data
C) To visualize data
D) To analyze data
Answer: A) To process data
Explanation: A Logstash pipeline is used to process data by defining a series of input, filter, and output plugins to transform and route data through the pipeline.
5. Which of the following is a Logstash input plugin?
A) Elasticsearch
B) Beats
C) S3
D) None of the above
Answer: B) Beats
Explanation: Beats is a Logstash input plugin that can be used to collect and ship data from a variety of sources, including system logs, network data, and metrics.
6. Which of the following is a Logstash filter plugin?
A) Elasticsearch
B) Grok
C) Amazon SNS
D) None of the above
Answer: B) Grok
Explanation: Grok is a Logstash filter plugin that can be used to parse and transform unstructured data into structured data that can be easily analyzed and visualized.
7. Which of the following is a Logstash output plugin?
A) Elasticsearch
B) File
C) CloudWatch
D) None of the above
Answer: B) File
Explanation: The File output plugin can be used to write processed data to a file on the local filesystem, which can be useful for storing log data or outputting data to other systems.
8. What is the purpose of Logstash’s Elasticsearch output plugin?
A) To store processed data in Elasticsearch
B) To send processed data to Kibana for visualization
C) To send processed data to external systems
D) None of the above
Answer: A) To store processed data in Elasticsearch
Explanation: The Elasticsearch output plugin can be used to store processed data in Elasticsearch, which can be used for searching, analyzing, and visualizing data using Kibana.
9. Which of the following is not a Logstash plugin type?
A) Input
B) Filter
C) Output
D) Dashboard
Answer: D) Dashboard
Explanation: Dashboard is not a Logstash plugin type. The three plugin types in Logstash are Input, Filter, and Output.
10. Which Logstash plugin can be used to aggregate metrics data?
A) Metric
B) Aggregate
C) Statsd
D) None of the above
Answer: A) Metric
Explanation: The Metric filter plugin can be used to aggregate metrics data and generate statistical summaries of the data for analysis and visualization.
11. Which of the following is not a Logstash output plugin?
A) Elasticsearch
B) HTTP
C) CloudWatch
D) Gzip
Answer: D) Gzip
Explanation: Gzip is not a Logstash output plugin. The three common output plugins in Logstash are Elasticsearch, HTTP, and CloudWatch.
12. What is the default port number for Logstash?
A) 8080
B) 9200
C) 9300
D) 9600
Answer: D) 9600
Explanation: The default port number for Logstash is 9600, which can be used to access the Logstash API and monitor the status of the Logstash service.
13. Which of the following is not a valid Logstash configuration file format?
A) YAML
B) JSON
C) XML
D) All of the above are valid formats
Answer: C) XML
Explanation: XML is not a valid Logstash configuration file format. The two valid formats are YAML and JSON.
14. Which of the following Logstash plugins can be used to monitor system metrics?
A) Collectd
B) Topbeat
C) JMX
D) All of the above
Answer: D) All of the above
Explanation: Collectd, Topbeat, and JMX are all Logstash input plugins that can be used to collect and monitor system metrics.
15. Which of the following is not a Logstash filter plugin?
A) Grok
B) Mutate
C) Elasticsearch
D) Date
Answer: C) Elasticsearch
Explanation: Elasticsearch is not a Logstash filter plugin. The three common filter plugins in Logstash are Grok, Mutate, and Date.
16. Which of the following is not a valid Logstash output format?
A) CSV
B) JSON
C) XML
D) None of the above
Answer: C) XML
Explanation: XML is not a valid Logstash output format. The two valid formats are CSV and JSON.
17. Which of the following is not a Logstash command-line option?
A) -f
B) -c
C) -p
D) -m
Answer: D) -m
Explanation: -m is not a Logstash command-line option. The three common options are -f (configuration file), -c (config string), and -p (plugin path).
18. Which of the following is a Logstash plugin that can be used to parse CSV data?
A) Grok
B) CSV
C) JSON
D) None of the above
Answer: B) CSV
Explanation: The CSV filter plugin can be used to parse CSV data into fields that can be processed and analyzed by Logstash.
19. Which of the following is a Logstash output plugin that can be used to send data to Amazon S3?
A) S3
B) AWS
C) CloudWatch
D) None of the above
Answer: A) S3
Explanation: The S3 output plugin can be used to send processed data to an Amazon S3 bucket for storage and analysis.
20. Which of the following is a Logstash plugin that can be used to parse JSON data?
A) Grok
B) CSV
C) JSON
D) None of the above
Answer: C) JSON
Explanation: The JSON filter plugin can be used to parse JSON data into fields that can be processed and analyzed by Logstash.
21. Which of the following is a Logstash plugin that can be used to monitor MySQL database metrics?
A) JDBC
B) MySQL
C) JMX
D) None of the above
Answer: A) JDBC
Explanation: The JDBC input plugin
22. Which of the following is a Logstash output plugin that can be used to send data to Kafka?
A) Kafka
B) Output-kafka
C) Logstash-kafka
D) None of the above
Answer: A) Kafka
Explanation: The Kafka output plugin can be used to send processed data to a Kafka topic for further processing and analysis.
23. Which of the following is a Logstash plugin that can be used to parse syslog data?
A) Grok
B) CSV
C) Syslog
D) None of the above
Answer: C) Syslog
Explanation: The Syslog input plugin can be used to parse syslog data into fields that can be processed and analyzed by Logstash.
24. Which of the following is a Logstash output plugin that can be used to send data to AWS CloudWatch Logs?
A) CloudWatch
B) CloudWatch-logs
C) AWS-logs
D) None of the above
Answer: B) CloudWatch-logs
Explanation: The CloudWatch-logs output plugin can be used to send processed data to AWS CloudWatch Logs for storage and analysis.
25. Which of the following is a Logstash plugin that can be used to parse Apache log data?
A) Grok
B) CSV
C) Apache
D) None of the above
Answer: A) Grok
Explanation: The Grok filter plugin can be used to parse Apache log data into fields that can be processed and analyzed by Logstash.
26. Which of the following is a Logstash plugin that can be used to monitor Windows Event Logs?
A) Winlog
B) Eventlog
C) JMX
D) None of the above
Answer: A) Winlog
Explanation: The Winlog input plugin can be used to monitor Windows Event Logs and collect data for analysis by Logstash.
27. Which of the following is a Logstash output plugin that can be used to send data to an FTP server?
A) FTP
B) Output-ftp
C) Logstash-ftp
D) None of the above
Answer: A) FTP
Explanation: The FTP output plugin can be used to send processed data to an FTP server for storage and analysis.
28. Which of the following is a Logstash plugin that can be used to parse Nginx log data?
A) Grok
B) CSV
C) Nginx
D) None of the above
Answer: A) Grok
Explanation: The Grok filter plugin can be used to parse Nginx log data into fields that can be processed and analyzed by Logstash.
29. Which of the following is a Logstash output plugin that can be used to send data to an email server?
A) Email
B) Output-email
C) Logstash-email
D) None of the above
Answer: A) Email
Explanation: The Email output plugin can be used to send processed data to an email server for notification and analysis.
30. Which of the following is a Logstash plugin that can be used to monitor Kafka topics?
A) Kafka
B) Input-kafka
C) Logstash-kafka
D) None of the above
Answer: B) Input-kafka
Explanation: The Input-kafka plugin can be used to monitor Kafka topics and collect data for analysis by Logstash.
31. Which of the following is a Logstash output plugin that can be used to send data to Elasticsearch?
A) Elastic
B) Elasticsearch
C) Output-elasticsearch
D) None of the above
Answer: B) Elasticsearch
Explanation: The Elasticsearch output plugin can be used to send processed data to Elasticsearch for storage and analysis.
32. Which of the following is a Logstash plugin that can be used to monitor JMX metrics?
A) JMX
B) Metrics
C) Logstash-jmx
D) None of the above
Answer: A) JMX
Explanation: The JMX input plugin can be used to monitor JMX metrics and collect data for analysis by Logstash.
33. Which of the following is a Logstash output plugin that can be used to send data to a MySQL database?
A) MySQL
B) Output-mysql
C) Logstash-mysql
D) None of the above
Answer: A) MySQL
Explanation: The MySQL output plugin can be used to send processed data to a MySQL database for storage and analysis.
34. Which of the following is a Logstash plugin that can be used to parse XML data?
A) XML
B) Filter-xml
C) Logstash-xml
D) None of the above
Answer: A) XML
Explanation: The XML filter plugin can be used to parse XML data into fields that can be processed and analyzed by Logstash.
35. Which of the following is a Logstash plugin that can be used to monitor SNMP traps?
A) SNMP
B) Trap
C) Logstash-snmp
D) None of the above
Answer: A) SNMP
Explanation: The SNMP input plugin can be used to monitor SNMP traps and collect data for analysis by Logstash.
36. Which of the following is a Logstash output plugin that can be used to send data to a PostgreSQL database?
A) PostgreSQL
B) Output-postgresql
C) Logstash-postgresql
D) None of the above
Answer: A) PostgreSQL
Explanation: The PostgreSQL output plugin can be used to send processed data to a PostgreSQL database for storage and analysis.
37. Which of the following is a Logstash plugin that can be used to parse Apache access log data?
A) Grok
B) CSV
C) Apache
D) None of the above
Answer: A) Grok
Explanation: The Grok filter plugin can be used to parse Apache access log data into fields that can be processed and analyzed by Logstash.
38. Which of the following is a Logstash output plugin that can be used to send data to a Redis server?
A) Redis
B) Output-redis
C) Logstash-redis
D) None of the above
Answer: A) Redis
Explanation: The Redis output plugin can be used to send processed data to a Redis server for storage and analysis.
39. Which of the following is a Logstash output plugin that can be used to send data to a Kafka broker?
A) Kafka
B) Output-kafka
C) Logstash-kafka
D) None of the above
Answer: A) Kafka
Explanation: The Kafka output plugin can be used to send processed data to a Kafka broker for storage and analysis.
40. Which of the following is a Logstash plugin that can be used to parse Apache error log data?
A) Grok
B) CSV
C) Apache
D) None of the above
Answer: A) Grok
Explanation: The Grok filter plugin can be used to parse Apache error log data into fields that can be processed and analyzed by Logstash.
41. Which of the following is a Logstash output plugin that can be used to send data to a MongoDB database?
A) MongoDB
B) Output-mongodb
C) Logstash-mongodb
D) None of the above
Answer: A) MongoDB
Explanation: The MongoDB output plugin can be used to send processed data to a MongoDB database for storage and analysis.
42. Which of the following is a Logstash plugin that can be used to parse syslog-ng data?
A) Syslog-ng
B) Filter-syslog-ng
C) Logstash-syslog-ng
D) None of the above
Answer: A) Syslog-ng
Explanation: The Syslog-ng input plugin can be used to parse syslog-ng data into fields that can be processed and analyzed by Logstash.
43. Which of the following is a Logstash output plugin that can be used to send data to a Microsoft SQL Server database?
A) MSSQL
B) Output-mssql
C) Logstash-mssql
D) None of the above
Answer: A) MSSQL
Explanation: The MSSQL output plugin can be used to send processed data to a Microsoft SQL Server database for storage and analysis.
44. Which of the following is a Logstash plugin that can be used to monitor SNMP polling data?
A) SNMP
B) Poll
C) Logstash-snmp
D) None of the above
Answer: A) SNMP
Explanation: The SNMP input plugin can be used to monitor SNMP polling data and collect data for analysis by Logstash.
45. Which of the following is a Logstash output plugin that can be used to send data to an Apache Cassandra database?
A) Cassandra
B) Output-cassandra
C) Logstash-cassandra
D) None of the above
Answer: A) Cassandra
Explanation: The Cassandra output plugin can be used to send processed data to an Apache Cassandra database for storage and analysis.
46. Which of the following is a Logstash plugin that can be used to convert a timestamp field to a different timezone?
A) Date
B) Timezone
C) Filter-date
D) None of the above
Answer: B) Timezone
Explanation: The Timezone filter plugin can be used to convert a timestamp field to a different timezone for processing and analysis by Logstash.
47. Which of the following is a Logstash output plugin that can be used to send data to a Elasticsearch index?
A) Elasticsearch
B) Output-elasticsearch
C) Logstash-elasticsearch
D) None of the above
Answer: A) Elasticsearch
Explanation: The Elasticsearch output plugin can be used to send processed data to an Elasticsearch index for storage and analysis.
48. Which of the following is a Logstash plugin that can be used to remove fields from an event?
A) Remove
B) Filter-remove
C) Logstash-remove
D) None of the above
Answer: A) Remove
Explanation: The Remove filter plugin can be used to remove fields from an event before processing and analysis by Logstash.
49. Which of the following is a Logstash output plugin that can be used to send data to a Redis database?
A) Redis
B) Output-redis
C) Logstash-redis
D) None of the above
Answer: A) Redis
Explanation: The Redis output plugin can be used to send processed data to a Redis database for storage and analysis.
50. Which of the following is a Logstash output plugin that can be used to send data to a Kafka topic?
A) Kafka
B) Output-kafka
C) Logstash-kafka
D) None of the above
Answer: A) Kafka
Explanation: The Kafka output plugin can be used to send processed data to a Kafka topic for storage and analysis.
51. Which of the following is a Logstash output plugin that can be used to send data to a AWS S3 bucket?
A) S3
B) Output-s3
C) Logstash-s3
D) None of the above
Answer: A) S3
Explanation: The S3 output plugin can be used to send processed data to an AWS S3 bucket for storage and analysis.
52. Which of the following is a Logstash plugin that can be used to perform DNS lookups on IP addresses?
A) DNS
B) Lookup-dns
C) Logstash-dns
D) None of the above
Answer: A) DNS
Explanation: The DNS filter plugin can be used to perform DNS lookups on IP addresses for processing and analysis by Logstash.
53. Which of the following is a Logstash plugin that can be used to perform geoip lookup on IP addresses?
A) GeoIP
B) Lookup-geoip
C) Filter-geoip
D) None of the above
Answer: A) GeoIP
Explanation: The GeoIP filter plugin can be used to perform geoip lookup on IP addresses for processing and analysis by Logstash.
54. Which of the following is a Logstash output plugin that can be used to send data to a Microsoft Azure Blob Storage?
A) Azure_blob_storage
B) Output-azure-blob-storage
C) Logstash-azure-blob-storage
D) None of the above
Answer: A) Azure_blob_storage
Explanation: The Azure_blob_storage output plugin can be used to send processed data to a Microsoft Azure Blob Storage for storage and analysis.
55. Which of the following is a Logstash plugin that can be used to perform field concatenation?
A) Concatenate
B) Filter-concat
C) Logstash-concat
D) None of the above
Answer: B) Filter-concat
Explanation: The Concat filter plugin can be used to concatenate two or more fields into a single field before processing and analysis by Logstash.
56. Which of the following is a Logstash output plugin that can be used to send data to a Microsoft SQL Server?
A) SQL_Server
B) Output-sql-server
C) Logstash-sql-server
D) None of the above
Answer: A) SQL_Server
Explanation: The SQL_Server output plugin can be used to send processed data to a Microsoft SQL Server for storage and analysis.
57. Which of the following is a Logstash plugin that can be used to perform multiline processing?
A) Multiline
B) Filter-multiline
C) Logstash-multiline
D) None of the above
Answer: B) Filter-multiline
Explanation: The Multiline filter plugin can be used to perform multiline processing on log data before processing and analysis by Logstash.
58. Which of the following is a Logstash output plugin that can be used to send data to a Hadoop Distributed File System (HDFS)?
A) HDFS
B) Output-hdfs
C) Logstash-hdfs
D) None of the above
Answer: A) HDFS
Explanation: The HDFS output plugin can be used to send processed data to a Hadoop Distributed File System (HDFS) for storage and analysis.
59. Which of the following is a Logstash plugin that can be used to perform URL decoding?
A) URL_Decode
B) Filter-url-decode
C) Logstash-url-decode
D) None of the above
Answer: B) Filter-url-decode
Explanation: The URL_Decode filter plugin can be used to perform URL decoding on URL-encoded strings before processing and analysis by Logstash.
60. Which of the following is a Logstash plugin that can be used to perform conditional processing?
A) If
B) Filter-if
C) Logstash-if
D) None of the above
Answer: A) If
Explanation: The If filter plugin can be used to perform conditional processing on log data before processing and analysis by Logstash.
Logstash MCQs and Answers are a valuable resource for assessing and improving your knowledge of data processing and log analysis. With the growing need for efficient and effective data management, mastering Logstash can greatly benefit your career in software development and data analytics. Keep following the Freshersnow portal regularly to keep receiving updates on various technical quizzes.